Gas-engine.



I. LE R. JOHNSTON.

lGAS ENGINE.

APPLICATION FILED FEB. 9. II9I4. y

Patented May 23,1916.

3 SHEETS-SHEET I.

mmm..

I. LE R. JOHNSTON.

GAS ENGINE.

APPLICATION FILED IEB. 9, 1914.'

Patented May 23, 1916.

3 SHEETS-SHEET 2.

'l mmm.

Ehm/mow 04% www www? in ner remission,

- inenten. W

lli

titl entrino ofi the 2-cycle type.

:or nennen?,

cnronntnssronon 'ro msmn .reime o..

ens-nnenvn tneelteation of mettere Potent. l

' dnnlioetlon tiled tetruery t, mit. Serial No. Stigter.

To all 'wltoartt may concertar.

Beit movin thatL-lssnc lin liter donnsnon, a citizen ot the llnitedStates, residing at Detroit," in the county oi Wayne and `State ciMichigan, have invented certain new and iis/etui improvements inGros-Englnes or vwhich the tollovving is a specidcation.

This invention relates to internal combustion engines, and moreparticularly to that,y class thereof which are generally ovvn arotary-type, and it has or one ot it objects the provision of sn engineoit thi/s class comprising a multi-cylinderheod rttntahle within astationery casing -vvhi h contains the gas inlet and exhaust passagesand charnhe'rs.-

invention has, iinrtherniore tor its object the improved constructionand orgeniration oi the gas supplying mechanism which the presentinstance ycomprises tor establishing a supply ot gas under I. slightpressure, regardless oi the suction cstahlishcd'hy the rnovernent'ot thepiston within each cylinder. l

linrther omects oi the invention vvill hereiinafter epnear and heparticularly dened :in cieirns.

l he invention has heen clearly illustrated in the accompanyingdrawings, in which similar characters denote similar parte, and in whichiignre l regorese ts a central longitudinal section oi' an internalcombustion engine ernhodying iny invention.; v Fig. 2 is a crossseration on line 2--2 oi Fig. l. Fig. 3 is a sinnlar section on line 3-3 etFig. l, the several vievvs mentioned thus' tar illustrating .en

eterring to the drawings, l0 denotes. a cylindrical casing or shellprovided with lateinlly-ezntending` flanges ll whereby the saine may hesecured A upon any suitable trarne. This shell is closed at one end loya. cover or head l2 (see Fig. l), the hub portion i2 ont which isprovided Withua hell' hearing i3 tor rotetahly supporting the seeinshaft lt ot the engine et that point. tdirniliarly, the other end of thecasing l@ is provided with a head orcover l5, the hoh gooition l5 otwhich has a hall-bearing' lo tor supporting the shalt lt at that end.iironi the iforegoing it vvill he 'understood that the casing, togetherwith its lcovers 'l2 and l5, are stationary members.

Mounted tor rotation Within the casing i0 and closely vtting Within thesame, is a cylinderhead ll', one end oi vvhichis pro-A vided with acover member 18 having its central `portion secured to a flange lt ofthe rnain shaft lt, While its' oppositel end carries a' cover-member 19,the hub i9 ot which is supported Within the huh extension ot the, casingcover l5 through the intervention ot a hell-.hearlng 20, thus holdingthe several parts in true central relation relatively to each other.. l

ln Figs. i to 3, the head i7 comprisestvvo sets et cylinders, designatedin a general' Way ley fC .and QC", each set comprising` tour cylindersdesignated hy a, t, c, d, and e, f,

i y, it, respectively, the particular cylinders oftleach set beingpreferably so' disposed as to have their ares intersecting' each otherat 'lll right angles, ond furthermore so arranged that the ones ot thecylinders ot one set are located angnlarly halt vvsy hetvveen the axesont the second set. inasmuch as the engine ythus tar described is oi'the'tvvo-cycle type,

it tollovrs deringr, eech rotation oi the `rnain shaft and the cylinderhead eight irnypnlses vvill loe imparted to the same at equally spacedintervals. Mounted tor radial reciprocation in the several cylindersabove mentioned are pistons a", t', o, d, e",

f, g, it', respectively, each Aniston having a spindle 2l'entending1therethrongh and provided at its outer ends with anti-friction rollers22, one set traveling Within grooves Sil 23 oi" an eccentricallydisposed resistance .nieniher 2t which is stationary and lreyed to thehuh l5 oli the cover. lo, a lrey or spline 25 (see Fig. l). ln order toobtain uniformity of movement, the grooves 23 are preferably oi trueeccentric shape, and the resistance member 2li is provided with tvvosets oi such grooves 23, 25 respectively for the pairs oi" sets oi thepistons of the engine respectively, the organization being such that thehigh and low points of one groove vvill he` disposed halt" vvay, or atan ongle oi tortylive degrees (or an uneven multiple thereof) relativelyto the high and lovv points ot the other set.

Referring to liig. 2, the cylinder head rotates in thedirection oiarrow' a, and the enhaust port 26 is so disposed inthe casing` that eachcylinder will have a -toll communication' therewith when its piston has4arrived at the innermost end olits stroke, or in other Words, theexhaust will commence Milli litt 4due to the spark-plu approximatelydegrees".TV before the end ter being commonf to both? setsaof cylindersC, C as" clearly seen-in 2Fig.}=l. A Awater space 29 Ais provided topreserve the moving parts at proper temperature. In order to preventleakage in the outer ends of the cylinders duringthe compression strokeof the pistons, each cylinder is surrounded by a packing ring 30 seatedwithin a corresponding recess in the cylinder.- and maintained incontact with the, inner bore of the casing by a spring 31 seated withinan annular recess 32. fhis spring may be very light, because thecentrifugal force exerted upon the ring 30 during the rotation of thecylinder head will be amply sufficient to maintain the ring i ventleakage. 'lhe same constructlon applies to the cylinders of the secondset C" which exhaust through a port 33 communieating with the exhaustpipe 28 through a conduit 34. In order to support the lefthand end ofthe resistance member in proper relation to the shaft 14, a ball-bearingis interposed' between these two members at that point. Gas is suppliedto the several cylinders through a pipe\ 35, coming from any suitablecarbureter and communicating wit a conduitl36 provided on the cover 15and having an aperture 37 through which the gas may pass into the space38 which constitutes a gas chamber from which the gas is not onlypermitted to enter into the inner chamber 39.4of the cylinder head,but-is drawn thereinto by fan-blades 40 provided on the member 19 abovementioned, so that the rotation of the latter will tend to slightlycompress the gas Within the chamberv 39 from which the gases may enterthe several cylinders through slots 40', which not only act as ports butare furthermore utilized as guides for the anti-friction rollers 22above described:

By referring to Fig. 2'it will be seen that the operation is as follows:The piston gu is near the end of its inward stroke and cylinder g is,and has been, in communication with the exhaust port 26. In thisposition of the pistonthe greater part of the exhaustA gases havealready left the cylinder and the gas-inlet slots '40 are on the pointof being uncovered, and will thus remain uncovered during the nextsucceeding movement of forty-live degrees. of the cylinder headmovement. The charge of gas accumulated in the cylinder will then becompressed until the highest point of the eccentricpath of the grooves22 has been reached, whereupon the charge is fired by an electricalspark,

Sas usual in machines of this class, t e spark-plug having itsinner enddisposed wlthin a recess 45 30 in `close contact to preprovided for thatpurpose and into which the compressed. gas will enter as soon as thecompresslon chamber formed mthe piston will be in-,register therewith.The same operation just described in connection with the piston g andits c linder g, prevails for each of the other cylinders and pistons ofthis particular set. i

The other set, and the operation pertaining thereto, are clearly shownin Fig. 3, the spark-plug S seated Within the recess 45 exploding thecharge in the same manner as mentioned above, it` being understood thatthe several pistons a', b,"c, d', are controlled by the grooves 25 ofthe resistance melnber 24 above referred' to. While the gas of thecarbureter pipe 35 enters into the gas chamber 38 through the port 37,gas is also carried to the opposite end of the machine through a conduit46 opening into the conduit 36 and communicating at the other end with aconduit 47 constituting a part of the cover 12and opening through a port48 into the gas chamber 49 from which the gas is taken by fan-blades 50into the inner chamber 51 for distribution for the second set ofcylinders.

I claim:

1. A gas engine comprising a casing having an exhaust port and a gasinlet chamber, a head mounted for rotation in said casing and having alseries of consecutivelyoperative radial cylinders, pistons movable insaid cylinders respectively, a stationary resistance member having a camgroove, a

device carried by each piston and extending through the cylinder Wallinto said cam groove, means carried by said head for carrying gas underpressure into said gas'chamber, and a conduit connecting said gaschamber with each cylinder at a predetermined point of the pistonmovement. l

2. A gas engine comprising a casing having an exhaust port and a gasinlet chamber, a head mounted for rotation in said caslng and having aseries of cylinders open attheir outer ends and adapted to registerlwith said exhaust port, pistons movable in said cylinders respectively,a stationary resistance member having a cam groove, devices carried byeach piston and extending through the cylinder walls into said groove,

' means controlled by the 'movement of said lll sistance member havingacam groove, devices carried by each piston and extending through thecylinder walls into said groove,A

said cams, a stationary resistance member 15 secured at one end of thecasing, spindles carried by said pistons respectively, and eX- tendingthrough the Walls of the respective cylinders, and engaging said cams, ashaft, and a cover attached to one end of said head and secured to saidshaft.

In testimony whereof l affix my signature in presence of two Witnesses.

SAAC LE ROY JOHNSTON.

- Witnesses:

CHAs. F. SCHMELZ, H. l). MACDONALD.

